<?php
/**
* All functions for determining and loading language files and for
*  translating the text
* A few ideas and techniques were taken from the phpMyAdmin project
* @author Nick Korbel <lqqkout13@users.sourceforge.net>
* @version 03-14-05
* @package Languages
*
* Copyright (C) 2003 - 2005 phpScheduleIt
* License: GPL, see LICENSE
*/

/**
* You must add the language infomation for the language that you are including to the
*   $languages array below.
* Please keep the language keys in alphabetical order.  The basic logic for this array
*  is from the phpMyAdmin project.
*
* 1) The first 2 letters are the official language code.
*
* 2) The array must follow this order:
*	The first element is a regular expression that validates against possible
*	ways to identify the language and is in this format:
*	+ The official language code and the dialect code (country code) if it is needed.
*	  For example for all English translations: en([-_][[:alpha:]]{2})?, for Bulgarian: 'bu'
*	  In any case where there is more than one dialect, it should follow the English format
*	  In any case where there is only one dialect, it should follow the Bulgarian format
*	+ the '|' character
*	+ the full language name (lowercase)
*	The second element is the full file name of this translation.  This file name should
*	  always be in the format: 2 letter language code, the word 'lang', the '.php' extension
*	  For example for all English translatinos: en.lang.php
*	The third element is the official two letter language code
*	The final element is the full language name.  This will appear in the language
*	  pull down selection menu on the login page.  Please capatalize the first letter
*
*	If you are unsure of your language/dialect codes, please use the following resources -
*	+ Standard language codes: http://www.unicode.org/unicode/onlinedat/languages.html
*	+ Standard country codes:  http://www.unicode.org/unicode/onlinedat/countries.html	
*/

$languages = array (
	'en_US'	=> array('en([-_]us)?|english', 'en_US.lang.php', 'en', 'English US'),
	'en_GB'	=> array('en([-_]gb)?|english', 'en_GB.lang.php', 'en', 'English GB'),
	'es'	=> array('es([-_][[:alpha:]]{2})?|spanish', 'es.lang.php', 'es', 'Español'),
	'cs'	=> array('cs([-_][[:alpha:]]{2})?|czech', 'cs.lang.php', 'cs', '&#268;esky'),
	'fr'	=> array('fr([-_][[:alpha:]]{2})?|french', 'fr.lang.php', 'fr', 'Fran&ccedil;ais'),
	'it'	=> array('it([-_][[:alpha:]]{2})?|italian', 'it.lang.php', 'it', 'Italiano'),
        'pt_BR' => array('pt([-_]br)?|portuguese', 'pt_BR.lang.php', 'pt', 'Portuguese Brazilian')
);

// Language files directory	
@define('LANG_DIR', dirname(__FILE__) . '/../lang/');
	
/**
* Tries to determine the langauge for this user by
*  going though all options.
* @param none
* @return mixed language if it can be determined, or false if it cannot
*/ 
function determine_language() {
	global $conf;
	$lang = false;
	
	// Set the language
	if (isset($_GET['lang']) && !empty($_GET['lang'])) {
		$lang = $_GET['lang'];
	}
	else if (isset($_COOKIE['lang']) && !empty($_COOKIE['lang'])) {
		$lang = $_COOKIE['lang'];
	}
	else if (isset($_SESSION['lang']) && !empty($_SESSION['lang'])) {
		$lang = $_SESSION['lang'];
	}	
	else if ($lang = get_browser_lang()) {
		// Do nothing, it's done in the if	
	}
	else {
		$lang = $conf['app']['defaultLanguage'];
	}
	
	return $lang;
}

/**
* Loads the language file 
* @param none
*/
function load_language_file() {
	global $languages;
	global $lang;
	
	// Load the language file
	if (isset($languages[$lang]) && file_exists(LANG_DIR . $languages[$lang][1])) {
		include_once(LANG_DIR . $languages[$lang][1]);
		global $charset;
		header("Content-Type: text/html; charset=$charset");
		header("Content-Language: {$languages[$lang][2]}");
	}
	else {
		die('Could not load language file: ' . $languages[$lang][1]);
		setcookie('lang', '', time() - 2592000, '/');
	}
}

/**
* Tries to detect the language based on the current browser settings
* @param none
* @return mixed language value if it can be found, false if it cannot be found
*/
function get_browser_lang() {
	global $languages;
		
	if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE']) && !empty($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
		$http_accepted = split(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']);
		for ($i = 0; $i < count($http_accepted); $i++) {
			foreach ($languages as $lang => $vals) {
				if (eregi($vals[0], $http_accepted[$i]))
					return $lang;
			}
		}	
	}
	
	return false;	// If we get here, it wasnt found
}

/**
* Sets the session variable for $lang so we do not need to go
*  through the determining process each time
* @param string $lang language of current user
*/
function set_language($lang) {
	global $languages;
	global $conf;
	
	if (!isset($languages[$lang])) {
		$lang = $conf['app']['defaultLanguage'];
	}
	
	@session_start();
	setlocale(LC_ALL, $lang);
	setcookie('lang', $lang, time() + 2592000, '/');	
}

/**
* Translate the given string into the current lanaguage
* If the trasnlation does not exist, returns the default
*  lanaguage translation
* @param string $str string to translate
* @param array $vars optional array of variables to pass to a sprintf translation string
*/
function translate($str, $args = array()) {
	global $strings;
	
	$return = '';
	
	if (!isset($strings[$str]) || empty($strings[$str])) {
		return '?';
	}
		
	if (empty($args)) {
		return $strings[$str];
	}
	else {
		$sprintf_args = '';
		
		for ($i = 0; $i < count($args); $i++) {
			$sprintf_args .= "'" . addslashes($args[$i]) . "',";
		}

		$sprintf_args = substr($sprintf_args, 0, strlen($sprintf_args) - 1);
		$string = addslashes($strings[$str]);
		$return = eval("return sprintf('$string',$sprintf_args);");
		return $return;
	}
}

/**
* Translates an email message to the proper language
* @param string $email_index index of the email to translate from the lang.php file
* @param mixed unlimited number of arguments to be placed inline into the email
* @return translated email message
*/
function translate_email($email_index) {
	global $email;
	
	$return = '';
	$args = func_get_args();

	if (!isset($email[$email_index]) || empty($email[$email_index])) {
		return '?';
	}
	
	if (func_num_args() <= 1) {
		return $email[$email_index];
	}
	else {
		$sprintf_args = '';
		
		for ($i = 1; $i < count($args); $i++) {
			$sprintf_args .= "'" . addslashes($args[$i]) . "',";
		}
		
		$sprintf_args = substr($sprintf_args, 0, strlen($sprintf_args) - 1);
		$return = eval('return sprintf("' . str_replace('"','\"',$email[$email_index]) . "\",$sprintf_args);");
		return $return;
	}
}

/**
* Returns a formatted date for current section
* @param string $date_index index of date to get
* @return formatted date for that index
*/
function translate_date($date_index, $date) {
	global $dates;
	global $days_full;
	global $days_abbr;
	global $months_abbr;	
	global $months_full;
	
	if (!isset($dates[$date_index]) || empty($dates[$date_index])) {
		return '?';
	}
	
	$date_format = $dates[$date_index];
	
	// This takes care of when day/month names are not translated by PHP
	if (strpos($date_format, '%a') !== false) {
		$date_format = str_replace('%a', '+d', $date_format);
		$day_name = $days_abbr[date('w', $date)];
	}
	if (strpos($date_format, '%A') !== false) {
		$date_format = str_replace('%A', '+d', $date_format);
		$day_name = $days_full[date('w', $date)];
	}
	if (strpos($date_format, '%b') !== false) {
		$date_format = str_replace('%b', '+m', $date_format);
		$month_name = $months_abbr[date('n', $date)-1];
	}
	if (strpos($date_format, '%B') !== false) {
		$date_format = str_replace('%B', '+m', $date_format);
		$month_name = $months_full[date('n', $date)-1];
	}
	
	$return = strftime($date_format, $date);
	
	if (isset($day_name)) {
		$return = str_replace('+d', $day_name, $return);
	}
	
	if (isset($month_name)) {
		$return = str_replace('+m', $month_name, $return);
	}
	
	return $return;
}

/**
* Returns the array of lanugages
* @param none
* @return array of languages
*/
function get_language_list() {
	global $languages;
	return $languages;
}
?>